As an Acapulco cliff diver drops into the water from a height of 46 m, his gravitational potential energy decreases by 25,000 J. What is the diver’s weight in newtons?

GPE = m*g*h.

so 25000 J = m * 9.81m/s^2 * 46m

implying the diver's mass is 55.4 kg. precisely what you got.

and from there his/her weight is m*g, which is 55.4kg * 9.81m/s^2 = 543.5 N

Explanation:

it becomes positively charged by charging it

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.